Buy 4-FA

4.67 out of 5
(3 customer reviews)


4-FA for sale

4-FA for sale on We have the highest quality 4-FA online for sale. If you need the purest 4-FA online for research purposes, contact us or place an order here. 4Fluoroamphetamine (Flux, Fifa.4FA4-FMP; PAL-303; “Flux”), also known as para-fluoroamphetamine (PFA) is a psychoactive research chemical of the phenethylamine and substituted amphetamine chemical classes.



Buy 4-FA Online

Buy the real 4-FA online instantly. Riomeds will deliver or ship 4-FA to your location worldwide.  Anecdotal reports have described the subjective effects of 4-FA as having a moderate MDMA-like entactogenic onset for the initial few hours of the experience that then gradually transitions into traditional amphetamine-type stimulation (for a total duration of around 6 to 8 hours) with residual effects that can last a few hours afterward. Buy 4-FA online on Riomeds.

The Formula is: C9H12FN
The Molar mass is: 153.2 g/mol
The ChemSpider ID is: 9592
The PubChem CID is: 9986
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Where can I buy 4-FA legally

What is 4-FA

4-FA is rarely found on the streets but was commonly sold as a grey area research chemical by online vendors along with related compounds such as 2-FMA and 3-FA. Very little data exists about the pharmacological properties, metabolism, and toxicity of 4-FA, and it has only a brief history of human usage. Due to its strong psychostimulant effects, likely habit-forming properties as well as poorly understood toxicity profile, it is strongly recommended that one use proper harm reduction practices if choosing to use this substance. Buy 4-FA online Legally on RioMeds.

Buying 4-FA on the street.

When buying 4-FA on the street, the following names can be used: Flux, Fifa.4FA4-FMP; PAL-303.

What does 4-FA look like?

4-FA HCl is a white crystalline powder.

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Dosage is usually similar to MDMA, about 80-120 mg or a mostly full small (size 4) capsule, depending on the consistency of the powder. If one is eyeballing this substance, it is recommended to take a few sprinkles, wait for the little bit to take effect, and stagger it out based on how the starter dose feels. Volumetric Liquid Dosing is one way to accurately measure milligram amounts.

40 mg
Light: 40 – 100 mg
Common: 100 – 130 mg
Strong: 130 – 150 mg
Heavy: 150 mg +
Duration Total: 5 – 8 hours
Onset: 45 – 75 minutes
Come up: 30 – 75 minutes
Peak: 2.5 – 3.5 hours
Offset: 2 – 3 hours
After effects: 6 – 12 hours



The physical effects are marked by increased alertness, heart rate, blood pressure, appetite suppression, bruxism (jaw clenching), and nystagmus (eye wiggles). Seizures appear to be rare but possible, especially in those prone or physically stressed. The risk for seizures can be reduced by following the harm reduction measures and not combining with drugs that also decrease the seizure threshold, the details of which are discussed later in this literature.

The subjective effects of 4-fluoroamphetamine include euphoria which some find similar to the effects of MDMA and amphetamine, increased energy (stimulation), mood elevation, feelings of warmth and empathy, excessive talking, bruxism, and suppressed appetite (anorexic). The general course of effects involves primarily empathogenic effects for the first few hours, which fades out as increased stimulation develops over the next several hours.

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If you’re taking a more recreational amount, the main effects will last 4-5 hours and be followed by more amphetamine-like stimulation for a few more hours.


It’s not going to be particularly useful as a productive stimulant when over 100 mg is used. Around 50 to 75 mg is reportedly useful as a productivity aid, similarly to common amounts of amphetamine. Also, it may be productive once the core entactogenic-like effects have worn off with higher doses.


Additional information


25 Grams, 100 Grams, 250 Grams, 500 Grams, 1 Kilogram

3 reviews for Buy 4-FA

  1. 5 out of 5

    J. Robles

    I am a great customer of riomeds and a fan of 4-FA so i thought I should add this. When it comes to dosage, 4-FA cannot be ‘stacked’ like ecstasy throughout the night. Recommended dosage for the night is about 100-150. Taking more than this will greatly increase chances of having negative side effects but will most likely not enhance your experience. Try taking 100mg, and if you like it redose with 50. You should be safe then.

  2. 5 out of 5


    Some people call it mdma light but in my opinion it’s more than that. You have to imagine the mdma love, the feeling of ultimate connection with others and everything is beautiful but it has 2 differences. 1, there isn’t a headspace, no drowsy dreamy feeling. Instead you are really fucking clear headed. 2, it gives a amfetamine like Rush, if I take mdma I have energy to party for like 3 hours, after that I wanna lay back and chil. With 4fa you can party 6 hours long without feeling any fatigue. It will amplifies your skills on the dance floor for sure.

  3. 4 out of 5


    Just so you all know, 4-FA works on the serotonin system, just like ecstasy, so the 6-8 weeks rule also applies to 4-FA. There is also cross-tolerance between the two so don’t use ecstacy one week and 4-FA the week after. On average, i willl give this product a 4/5

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